Our projection model isn't a marketing trick. It's a weighted response estimate against an N=847 longitudinal cohort. Here's how it was built and how to verify it.
847 subjects, ages 14–34, recruited between 2021 and 2025 across English-speaking online communities. Selection bias acknowledged: subjects were self-selecting and motivated. We do not generalize beyond that population.
Baseline and Week-12 measurements were performed under standardized conditions: morning (within 15 min of waking), barefoot, against a fixed wall, with a 1mm-graduated stadiometer or equivalent. Self-measurement was validated against a clinician scan for ~10% of the cohort with <3mm variance.
The projection model is a weighted multilinear estimate across four orthogonal axes — posture, endocrine baseline, genetic midparent gap, and lifestyle execution. Weights were fit against observed deltas in the n=520 calibration subset and validated on the held-out n=327 cohort.
"This isn't a clinical trial. We don't claim it is. It's a longitudinal observational cohort study with a published response model. If you have a stronger methodology to offer, we will adopt it."— Methodology preface, v12.4
The anonymized dataset (n=847 with no PII) is available to researchers, journalists, and serious skeptics on signed request. We've also seeded the dataset with three independent reviewers (sleep researcher, biomechanist, statistician). Their notes are part of the model card.
Email [email protected] with affiliation and intent. We respond in 72 hours.
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